// Tooltips Class
// A superclass to work with simple CSS selectors
var Tooltips = Class.create();
Tooltips.prototype = {
    initialize: function(selector, options) {
        var tooltips = $$(selector);
        tooltips.each( function(tooltip) {
            new Tooltip(tooltip, options);
        });
    }
};
// Tooltip Class
var Tooltip = Class.create();
Tooltip.prototype = {
    initialize: function(el, options) {
        this.el = $(el);
        this.initialized = false;
        this.setOptions(options);
        
        // Event handlers
        this.showEvent = this.show.bindAsEventListener(this);
        this.hideEvent = this.hide.bindAsEventListener(this);
        this.updateEvent = this.update.bindAsEventListener(this);
        Event.observe(this.el, "mouseover", this.showEvent );
        Event.observe(this.el, "mouseout", this.hideEvent );
        
        // Content for Tooltip is either given through 
        // 'content' option or 'title' attribute of the trigger element. If 'content' is present, then 'title' attribute is ignored.
        // 'content' is an element or the id of an element from which the innerHTML is taken as content of the tooltip
        if (options && options['content']) {
            this.content = $(options['content']).innerHTML;
        } else {
            this.content = this.el.title.stripScripts().strip();
        }
        // Removing title from DOM element to avoid showing it
        this.content = this.el.title.stripScripts().strip();
        this.el.title = "";

        // If descendant elements has 'alt' attribute defined, clear it
        this.el.descendants().each(function(el){
            if(Element.readAttribute(el, 'alt'))
                el.alt = "";
        });
    },
    setOptions: function(options) {
        this.options = {
            backgroundColor: '#999', // Default background color
            borderColor: '#666', // Default border color
            textColor: '', // Default text color (use CSS value)
            textShadowColor: '', // Default text shadow color (use CSS value)
            maxWidth: 250,  // Default tooltip width
            align: "left", // Default align
            delay: 250, // Default delay before tooltip appears in ms
            mouseFollow: true, // Tooltips follows the mouse moving
            opacity: .75, // Default tooltips opacity
            appearDuration: .25, // Default appear duration in sec
            hideDuration: .25 // Default disappear duration in sec
        };
        Object.extend(this.options, options || {});
    },
    show: function(e) {
        this.xCord = Event.pointerX(e);
        this.yCord = Event.pointerY(e);
        if(!this.initialized)
            this.timeout = window.setTimeout(this.appear.bind(this), this.options.delay);
    },
    hide: function(e) {
        if(this.initialized) {
            this.appearingFX.cancel();
            if(this.options.mouseFollow)
                Event.stopObserving(this.el, "mousemove", this.updateEvent);
            new Effect.Fade(this.tooltip, {duration: this.options.hideDuration, afterFinish: function() { Element.remove(this.tooltip) }.bind(this) });
        }
        this._clearTimeout(this.timeout);
        
        this.initialized = false;
    },
    update: function(e){
        this.xCord = Event.pointerX(e);
        this.yCord = Event.pointerY(e);
        this.setup();
    },
    appear: function() {
        // Building tooltip container
        this.tooltip = new Element("div", { className: "tooltip", style: "display: none" });
        
        var arrow = new Element("div", { className: "xarrow" }).insert('<b class="a1"></b><b class="a2"></b><b class="a3"></b><b class="a4"></b><b class="a5"></b><b class="a6"></b>');
        
        var top = new Element("div", { className: "xtop" }).insert(
            new Element("div", { className: "xb1", style: "background-color:" + this.options.borderColor + ";" })
        ).insert(
            new Element("div", { className: "xb2", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" })
        ).insert(
            new Element("div", { className: "xb3", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" })
        ).insert(
            new Element("div", { className: "xb4", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" })
        );
        
        var bottom = new Element("div", { className: "xbottom" }).insert(
            new Element("div", { className: "xb4", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" })
        ).insert(
            new Element("div", { className: "xb3", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" })
        ).insert(
            new Element("div", { className: "xb2", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" })
        ).insert(
            new Element("div", { className: "xb1", style:"background-color:" + this.options.borderColor + ";" })
        );
        
        var content = new Element("div", { className: "xboxcontent", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + 
            ((this.options.textColor != '') ? "; color:" + this.options.textColor : "") + 
            ((this.options.textShadowColor != '') ? "; text-shadow:2px 2px 0" + this.options.textShadowColor + ";" : "") }).update(this.content);
            
        // Building and injecting tooltip into DOM
        this.tooltip.insert(arrow).insert(top).insert(content).insert(bottom);
        $(document.body).insert({'top':this.tooltip});
        
        // Coloring arrow element
        this.tooltip.select('.xarrow b').each(function(el){
            if(!el.hasClassName('a1'))
                el.setStyle({backgroundColor: this.options.backgroundColor, borderColor: this.options.borderColor });
            else
                el.setStyle({backgroundColor: this.options.borderColor });
        }.bind(this));
        
        Element.extend(this.tooltip); // IE needs element to be manually extended
        this.options.width = this.tooltip.getWidth() + 1; // Quick fix for Firefox 3
        this.tooltip.style.width = this.options.width + 'px'; // IE7 needs width to be defined
        
        this.setup();
        
        if(this.options.mouseFollow)
            Event.observe(this.el, "mousemove", this.updateEvent);
            
        this.initialized = true;
        this.appearingFX = new Effect.Appear(this.tooltip, {duration: this.options.appearDuration, to: this.options.opacity });
    },
    setup: function(){
        // If content width is more then allowed max width, set width to max
        if(this.options.width > this.options.maxWidth) {
            this.options.width = this.options.maxWidth;
            this.tooltip.style.width = this.options.width + 'px';
        }
            
        // Tooltip doesn't fit the current document dimensions
        if(this.xCord + this.options.width >= Element.getWidth(document.body)) {
            this.options.align = "right";
            this.xCord = this.xCord - this.options.width + 20;
            this.tooltip.down('.xarrow').setStyle({left: this.options.width - 24 + 'px'});
        } else {
            this.options.align = "left";
            this.tooltip.down('.xarrow').setStyle({left: 12 + 'px'});
        }
        
        this.tooltip.style.left = this.xCord - 7 + "px";
        this.tooltip.style.top = this.yCord + 12 + "px";
    },
    _clearTimeout: function(timer) {
        clearTimeout(timer);
        clearInterval(timer);
        return null;
    }
};